Given the following sets. A = {0, 1, 2, 3} B = {a, b, c, d} C = {0, a, 2, b} Find B U C.
{0, 1, 2, 3}
{a, b, c, d}
{0, a, 2, b}
empty set
{a, b, c, d, 0, 2}